Support renamed routing bulk parameter (#735)

Author: bungoume

elasticsearch/helpers/__init__.py

@@ -36,7 +36,7 @@ def expand_action(data):
  data = data.copy()
  op_type = data.pop('_op_type', 'index')
  action = {op_type: {}}
- for key in ('_index', '_parent', '_percolate', '_routing', '_timestamp',
+ for key in ('_index', '_parent', '_percolate', '_routing', '_timestamp', 'routing',
  '_type', '_version', '_version_type', '_id',
  'retry_on_conflict', 'pipeline'):
  if key in data: